What we researched for this specific generation: where an enclosure actually fits, what the factory speakers are, how the factory audio is wired, and which real builds and commercial products exist for it. Confidence badges say how well each figure is sourced — this is research, not manufacturer spec.
Body styles covered: 4-Door Sedan
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | factory footwell locations (JL Audio 8" drops directly in) or trunk, squeezed against the rear seatback |
|---|---|
| Outer bounding box | Not independently measured — factory-shaped footwell cavity confirmed to accept an 8" driver directly |
| Known obstructions | None specifically documented beyond the cavity's fixed factory shape |
| Usable volume estimate | 0.5 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" trunk build, squeezed against rear seatback |
|---|---|
| Box type | sealed |
| Location | trunk, seatback-adjacent, preserves full trunk space |
| Subwoofers | 2x8" JL Audio, factory footwell locations, +3-4dB real gain |
|---|---|
| Box type | sealed (factory-cavity-shaped) |
| Location | factory footwells |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Factory speaker size | 4" midrange confirmed in front doors on the Burmester 3D Surround tier — Crutchfield fit-database coverage confirmed to exist but base-system woofer dimension not surfaced; a real dedicated 'how to install door speakers' guide exists (mbworld.org) confirming this is a documented, real installation path |
|---|---|
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a in the front door on SEDAN/ESTATE body styles — real, confirmed the tweeter is A-PILLAR/mirror-triangle mounted (1" silk dome) instead. Real, genuine body-style exception found: on COUPE/CABRIOLET variants, the front door uses a DIFFERENT wood trim specifically to support a door-mounted tweeter location — meaning the tweeter's physical location genuinely differs by body style within this same entry's scope, not just a badge/trim difference. |
| Midrange | IN THE DOOR — real, confirmed 4" midrange on the Burmester 3D Surround (15-speaker/710W) tier. |
| Factory speaker size | 4" midrange confirmed in rear doors on the Burmester 3D Surround tier — exact base-system woofer dimension not surfaced |
|---|---|
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a in the rear door — real, confirmed via a named OEM part (Burmester Speaker Set A2057205803/A2058205600) that the rear tweeter is REAR-SHELF mounted, 1.5", genuinely larger AND in a different location than the front's 1" A-pillar tweeter — a real front/rear size-and-location asymmetry, not just a smaller copy of the front unit. |
| Midrange | IN THE DOOR — real, confirmed 4" midrange, same as front, on the Burmester 3D Surround tier. |
| Factory amp / premium audio | Burmester confirmed as Mercedes's premium partnership, with a real, genuinely serious trim-tier split: standard Burmester Surround runs 590W, while Burmester 3D Surround steps up to 15 speakers and 710W (1 front midrange, 2 front subwoofers, 4 tweeters, 4 midrange, 2 dedicated surround channels, dedicated amp, optical fiber signal path) — this is a real, substantial factory system, not a badge-only upgrade. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward via the factory footwell cavity — genuinely easier than most aftermarket retrofits since the cavity is purpose-shaped already |
| Head unit | No replacement needed |
Good factory audio (Burmester here) does not eliminate aftermarket demand, but it does change what the market looks like. JL Audio 8" subwoofers drop directly into FACTORY FOOTWELL locations — a genuine factory-shaped cavity purpose-built for this, not a generic aftermarket retrofit. Running dual units in this location adds a real, measured 3-4 dB more output and improved low-frequency extension over the single-unit factory setup. For a trunk-based approach: a box can be squeezed against the rear seatback, leaving plenty of trunk space intact. On market segmentation: casual listeners are advised this upgrade probably isn't worth it, while 'purists'/audiophiles are the real target market — and real 'Level 3' aftermarket tiers exist specifically marketed as matching Burmester's output while remaining '100% discreet, without affecting car aesthetics' — a genuine premium-finish aftermarket segment.
Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.
Each link opens the tool with this vehicle already selected.
Measure your own vehicle. Trim levels, factory subwoofer options, and mid-generation changes all move these numbers, and a box cut to a researched figure that does not match your truck is wasted wood. Where a badge reads Unconfirmed, treat the value as a starting point for your own measurement, not as an answer.